a + goalpost
a 用于第一次提到或非特指的一根球门柱。
A goalpost was knocked over in the storm.
一根球门柱在暴风雨中被撞倒了。
球门柱
球门的两个垂直侧柱之一；球场两端高大的Y形立柱(现多为玻璃纤维),橄榄球须从其间穿过才能射门得分；被不公平地移动(改变)的规则或目标
one of a pair of posts (usually joined by a crossbar) that are set up as a goal at each end of a playing field
球门的两个垂直侧柱之一
One of the two vertical side poles of a goal.
球场两端高大的Y形立柱(现多为玻璃纤维),橄榄球须从其间穿过才能射门得分
The tall Y-shaped upright, now usually of fiberglass, at either end of the playing field, through which a football must go in order for a field goal to be scored. (They were originally H-shaped, with one wooden post on either side.)
被不公平地移动(改变)的规则或目标
A rule or target that is "moved" (changed) unfairly; see move the goalposts.
The striker aimed the ball at the left goalpost but missed.
前锋将球瞄准左侧球门柱，但没有射中。
用法提示：这里的 goalpost 是名词，指左侧的球门柱。
The ball hit the goalpost and bounced back onto the field.
球击中了球门柱，然后弹回到球场上。
用法提示：句中 goalpost 作宾语，表示球门柱。
The goalkeeper stood between the goalposts, ready to block the shot.
守门员站在两根球门柱之间，准备扑救这次射门。
用法提示：goalposts 用复数形式，指两根球门柱。
a 用于第一次提到或非特指的一根球门柱。
A goalpost was knocked over in the storm.
一根球门柱在暴风雨中被撞倒了。
the 特指球员或双方都知道的那根球门柱。
The ball hit the goalpost and bounced out.
球击中了球门柱，弹了出去。
球场两端各有一根球门柱，one of the goalposts 指其中一根。
One of the goalposts was damaged, so the match was delayed.
其中一根球门柱损坏了，所以比赛被推迟了。
与 goalpost 义近，常用于美式足球；通常用复数 the uprights，强调垂直杆，不能指横梁。
口语和体育报道中可代指 goalpost（如 hit the post），但单独出现时需上下文限定，否则只是一般的柱子。
grammar · medium
易错句子The ball went between the goalpost.
正确表达The ball went between the goalposts.
between 表示“在两者之间”，球门有两根门柱，所以要用复数 goalposts。汉语名词没有复数变化，学习者容易漏掉 -s。
grammar · medium
易错句子The ball hit on the goalpost.
正确表达The ball hit the goalpost.
hit 是及物动词，后面直接接宾语 the goalpost，不需要介词 on。这是把汉语“撞到……上”的“上”直译成 on 造成的错误。
goal 指整个球门或一次进球得分；goalpost 仅指球门两侧的一根立柱。说球打到门柱时用 goalpost，说球进门或得分时用 goal。
crossbar 是连接两根 goalpost 的横杆，goalpost 是两侧的竖柱。球撞到横杆叫 crossbar，撞到立柱叫 goalpost。
击中门柱
His shot hit the goalpost and bounced back into play.
他的射门击中了门柱，弹回了场内。
（砰地）击中门柱
The free kick rattled the goalpost before going wide.
任意球砰地砸在门柱上，然后偏出了球门。
从门柱弹回
The free kick rebounded off the goalpost and was cleared.
任意球从门柱上弹回，被解围了。
在两门柱之间
The goalkeeper stood firmly between the goalposts and saved every shot.
守门员稳稳地站在两门柱之间，扑出了每一次射门。
穿过球门柱（进球）
The kick sailed straight through the goalposts for three points.
这次踢球径直穿过球门柱，得了三分。
goal（球门）+ post（柱子）
与球门柱共同构成球门的上横杆。
挂于球门柱和横梁后方，用来接住进球。
球门柱竖立在球场两端。
守门员把守球门柱之间的球门区域。
禁区犯规可能判罚点球，射门目标是球门柱之间的球门。
改变规则（尤指不公平地中途改变标准）
Just when we thought we'd met all the requirements, they moved the goalposts again.
就在我们认为已经满足所有要求时，他们又改变了规则。
Dictionary facts from ECDICT, WIKTIONARY.